Please remember you are trying to explain where money comes from to a lefty. If you have any sock puppets it might make it easier.What do you mean by 'your theory'?!
It's hardly contentious to point out that people aged 25 or younger don't have much wealth, is It? How would they?
Most people I know in that age group are studying, 'on their travels', or just starting their careers. Thats 1 in 3.
Now if 1 out of every 3 workers produces so little he is exempted from paying income tax,...well, it's not hard to work out why 10% own half the wealth or whatever.